Jar closure



J. O. ROLLINS JAR CLOSURE Filed Dec. 26. 1924 FEVE 4 i s; :i

/ l l' l 1 ////f abtozwugs Patented May 24, 1927. j Y

UNITED STATES JOHN' O. BOLLINS, WEST LOS ANGELES, CALIFORNIA.

JAR cLosUnn Application filed December 26, 1924. Serial No.'758,190.

My invention relates to preservingv jar closures, and the purpose of myinvention readily operated to liermeticallyseal the :contents of a vjarand to allow the ready opening thereof, sorthat `access to the 'contentsmay be had. j

It is also apurpose of my iuventionio provide a jar closure including ascrew cap and a closuie'cap having conical surfaces which co-operate sovthat when the screw cap is screwed home on the jarvit will operate toforce the closure capinto tight engagementwith the jar to hcrmeticallyVseal its contents. f c

It is also a purpose of my invention to provide a jar closure having avent opening to provide an air entrance to the jar, thus y greatlyfacilitating kthe removal of the closure. Y. l

A further purpose of my invention is the provision of a jar constructedto co-operate with a stationary element tofacilitate holding of the jarto permit removal of the closure. j

I. will describe only two forms of jar closures and one form of'jar, allembodying myy invention, and will then'point out the novel featuresthereofin claims.

. In the accompanying drawings,

Figuie 1 is a view showing in vertical section one form of jar closureand jar ein` bodying my invention;

Figure 2 is a fragmentary sectional view showing another form of jarclosure einbodying my invention;

Fieure 3 is a fragmentary sectional view showing one foi-m of ventinginstrument in applied position with respect to the-vent plug of the jarclosure; f

Figure 4 is a top plan View of the head and plate shown in Figure 1.

Similar reference characters refer to similar parts throughout theseveral views.

Referring specifically to the drawings and particularly to Figure 1,designates a support, such as a table or the like, upon which is secureda plate 16 formed centrally thereof with a projection 17 of angularform, which, in the present instance, is shown as square.

A jar formed of glass or other suitable material is formed at its bottomto provide a socketf'18 khaving the same contour as the projection 17,so as to receive the latter, and to thereby hold .the jar againstrotation on is' "the provision of a jar closure which can'be the plate.The mouth of the jar is formed with an annular collar '19 which isexteriorly threaded to engage with the threads 20ct' a screw cap 2l, thelatter Abeing preferably formed of metal. 'The'j'arvncck is formedr toYprovidel an annular sliouldei22upon lwhich a rubber gasket 23 isadapted to repose, so as to be interposed.between Athe lshoulder and aflange 24 formed on a closure ca'pv25.

As clearly shown in Figure 1, the screw cap 21 and the closure cap 25are of attenuaied conical forinso as to provide at the vertical axes ofthe two a bearing I26 on which the screw cap is adapted'to rotate dur-Aing the application `of-the cap to the jar to force theclosure'pcafp*downwardly lso that its iiange "24 will be pressedintofirm eiigageniicnt with the gasket 23to provide af fluid tiglitfjointbetween the jar neck and y the jar cap. v Y E y f v It is to beparticularly noted that because of the conical forni of the closure capand screw cap a small bearing surface between the two is provided toeliminate undue friction 5in facilitating the rotationfof the screw cap,and at the saine time exerting suiiicient pressure on the closure cap toproduce the fluid tight joint.

In the form of closure cap just described, difficulty may be encounteredin unscrewing the cap 21, because of the fact that no means is providedfor admitting air tothe ar. To overcome this difficulty, the jar isplaced on the plate 1G so that the socket 18 receives the projection 17when it will be clear that the jar is held against rotation so thatsufficient force may be applied to the screw cap in effec-ting anunscrewing thereof.

Referring now to Figure 2, I Vhave here shown another form of jarclosure which is identical to theform shown in Figure 1 with theexception that the closure cap 25 is provided with a vent opening 27normally closed by a. plug 28,`which, .in the present instance, is acork. This plug 28 is designed to normally project from the uppersurface of the cap so that the crest of the screw cap will have contacttherewith 'during its application to the jar, so that simultaneouslywith the screwing of the cap, the plug will be forced downwardly intothe vent opening to provide an air tight seal. It has been found, inpractice, that some difficulty is experiencecl in removing the closurecap from the jar subsequent to the removal of the screw cap. Thisdifficulty is readily overcome by admitting air to the jar through theremoval of the plug 28, and it will be understood that removal of thelatter can be readily effeeted by the use of a cork screw.

Air may also be admitted to the jar through the use of a punchinginstrument; Which, as shown in Figure 3, comprises a tube 29 pointed atone end, as indicated at 30, and provided with ports 3l above *diepointed end through which air may pat-:s through the tube and into thejar when the instrument is in applied position with raterenee to theplug, as shown in Figure 55. 'It Will be understood that the instrumentcan be readily forced through the plug 28 subsequent `to the removal oithe screw Cap, and that the closure cap can be vremoved from the ar bylifting the instrument. Y

Although I have herein .shown and described only one term ot jar andmeans for preventing rotation thereof? tvro Jforme ot iar closures andone torni oi punching instrument, all embodyingl my invei'rtirnA` it tobe understood that various, elmnges and modifications may be n letherein Without. departingffroni the sprl-'it o't my invention and theSpirit and seo-pe oit the appended Y claims.

What is claimed is:

l. In Combination, a jar having a neel: provided with an annularshoulder, a gasket seating against the shoulder, a closure Cap removablyttedon the neck and having a portion adapted to bear against the gasket,

the Cap being provided centrally with a taperedopening7 a plug removablyitted in the opening and projecting above the plane of the Cap, andmeans separable from .the jar and adjustablevertically on the latterWith respect to the cap operating when moved towards the Cap Vto engagethe projecting poru tion o'l the plug so as to force the latter intosealing engagement with its opening and as a result ot the 'forceexerted against the plug to simultaneously torce theelosure Cap intosealing Shoulder. I I f 2. ln combination, a jar-having a neck providedexterior-ly with an annular shoulder, a gasket seating against theshoulder, a

4clofnre cap having a depending iange eurrounding` the neck and anoutwardly extending flange ree-ting on the gasket, the cap having athickened central portion provided with an axial tapered opening, atapered plug` removably iitted in the opening and ,jeeting above thejapi and-a conical cap Ying a depending annular flange threaded. torengagement vvthfthejar and operating when Ferewad upon the jar to engagethe projecting portion oi the plug so as to torce the latter downwardlyinto sealing engage- -nent With its opening and to simultaneously ortethe elo-sure cap downwardly as' a re- .lt oft the preeenre exertedagainst the plug, to thereby eii'eet sealing engagement of the flange ofthe closure cap with said annular shoulder'. y

JOHN O. ROLLINS,

un We.

engagement with` said annular

